def test_metadata_versions(self):
metadata = Metadata(mapping={'name': 'project', 'version': '1.0'})
self.assertEqual(metadata['Metadata-Version'],
PKG_INFO_PREFERRED_VERSION)
self.assertNotIn('Provides', metadata)
self.assertNotIn('Requires', metadata)
self.assertNotIn('Obsoletes', metadata)
metadata['Classifier'] = ['ok']
metadata.set_metadata_version()
self.assertEqual(metadata['Metadata-Version'], '1.1')
metadata = Metadata()
metadata['Download-URL'] = 'ok'
metadata.set_metadata_version()
self.assertEqual(metadata['Metadata-Version'], '1.1')
metadata = Metadata()
metadata['Obsoletes'] = 'ok'
metadata.set_metadata_version()
self.assertEqual(metadata['Metadata-Version'], '1.1')
del metadata['Obsoletes']
metadata['Obsoletes-Dist'] = 'ok'
metadata.set_metadata_version()
self.assertEqual(metadata['Metadata-Version'], '1.2')
metadata.set('Obsoletes', 'ok')
self.assertRaises(MetadataConflictError,
metadata.set_metadata_version)
del metadata['Obsoletes']
del metadata['Obsoletes-Dist']
metadata.set_metadata_version()
metadata['Version'] = '1'
self.assertEqual(metadata['Metadata-Version'], '1.1')
# make sure the _best_version function works okay with
# non-conflicting fields from 1.1 and 1.2 (i.e. we want only the
# requires/requires-dist and co. pairs to cause a conflict, not all
# fields in _314_MARKERS)
metadata = Metadata()
metadata['Requires-Python'] = '3'
metadata['Classifier'] = ['Programming language :: Python :: 3']
metadata.set_metadata_version()
self.assertEqual(metadata['Metadata-Version'], '1.2')
PKG_INFO = os.path.join(HERE, 'SETUPTOOLS-PKG-INFO')
metadata = Metadata(PKG_INFO)
self.assertEqual(metadata['Metadata-Version'], '1.1')
PKG_INFO = os.path.join(HERE, 'SETUPTOOLS-PKG-INFO2')
metadata = Metadata(PKG_INFO)
self.assertEqual(metadata['Metadata-Version'], '1.1')
# make sure an empty list for Obsoletes and Requires-dist gets ignored
metadata['Obsoletes'] = []
metadata['Requires-dist'] = []
metadata.set_metadata_version()
self.assertEqual(metadata['Metadata-Version'], '1.1')
# Update the _fields dict directly to prevent 'Metadata-Version'
# from being updated by the _set_best_version() method.
metadata._fields['Metadata-Version'] = '1.618'
self.assertRaises(MetadataUnrecognizedVersionError, metadata.keys)
